An amphibious cargo drone the size of a Boeing 777 airliners could soon take to the skies, according to a start-up firm in California. The company behind the craft plans to launch a full scale version in 2020, but first a prototype device will be undergoing tests this summer. And it could slash the cost of shipping cargo by half if it proves a success, by eliminating the need for on-board staff and maximising full efficiency. ​via MailOnLine